The PBT plate rolling machine is a new type of bending machine produced based on Japanese technology and combined with domestic practical conditions. It is a hydraulic upper roller movable plate bending machine. It is used to complete various processes such as pre-bending, rolling, and correcting of the end of carbon steel plates, low-alloy steel plates, and manganese steel plates at room temperature in one process. During normal operation, the working roller first rolls the steel plate into cylindrical or U-shaped workpieces; the upper roller can move in both vertical and horizontal directions.
Since the electrical control system of the PBT 3-roll bending machine adopts displacement sensors, coupled with a PLC programmable controller (produced by Japanese OMRON company) and a touchscreen, it can automatically detect the positions of the upper roller at both ends and monitor them in real-time to ensure synchronization accuracy. It not only can pre-bend and quickly roll plates, but also has high rolling accuracy of finished products without the need for auxiliary equipment, and requires less investment.
Pre-bending is achieved by moving the upper roller relative to asymmetric positions to roll the plate. During rolling, the motor and reducer drive the two lower rollers. Since the height of the lower roller remains unchanged, it is convenient for feeding and operation.
High-Performance of Component
- The PBT plate bending machine uses an industrial touchscreen, which, when combined with the PLC, achieves optimal performance. Detailed electrical schematic diagrams are provided, and the electrical wiring is strictly carried out according to the drawings, with clear and complete numbers at both ends of each wire. The wire terminal blocks are labeled with the same numbers as the connected wires, and corresponding marks are made on the electrical wiring diagrams and schematics.
- The main electrical components used in the PBT plate bending machine are all high-quality products from Siemens. Electrical protective devices (such as current relays, air switches, etc.) undergo rigorous testing before installation to ensure reliable operation.
- The hydraulic components used in the PBT plate bending machine are from well-known domestic brands. The equipment operates smoothly, with flexible control, no jamming, oil leakage, or abnormal noise.
- The painted surface is smooth and bright, without defects such as streaks or overspray. The tipping frame adopts hydraulic tipping, which is fast. The vertical displacement of the upper roller is driven by hydraulic transmission, and the horizontal movement is driven by mechanical transmission, with fast speed. (The upper roller can move up and down or horizontally to achieve pre-bending of the plate). The equipment has high reliability and low failure rate.
- Crown upper roller and adjustable lower roller support for high-precision product straightness Using a crown-shaped upper roller, the pre-set amount of crown for the upper roller is generally 70% of the roller’s evenly distributed load. The lower part of the lower roller has adjustable support rollers that can be adjusted up and down. By adjusting the support rollers at the lower part of the lower roller according to the load of the rolled product, the straightness of the product is greatly improved.
- Bending from the rear for high-precision product roundness The PBT plate bending machine adopts bending from the rear (the direction of feeding the plate is opposite to the direction of movement of the upper roller), where one side of the upper roller presses down while the lower roller rotates, continuously bending the plate. The end of the plate is directly pre-bent under pressure, avoiding the generation of rear corners after front bending, and controlling the length and shape of the remaining straight edge.
Generally, three-roll asymmetrical machines use front bending, pre-bending the ends of the plate, then symmetrically rolling to shape, which requires skilled operators, resulting in rear corners on the product and difficult control of the shape of the remaining straight edge.
- Minimization of product misalignment.
The PBT plate bending machine reduces product misalignment by taking the following measures:
- The dimensional accuracy and form and position tolerances of the two lower rollers and their center distance are controlled as key processes;
- Synchronous electro-hydraulic combination of the upper roller, using a feedback system for automatic leveling.High-precision pre-bending of ends When pre-bending the ends of the plate, the size of the horizontal movement of the upper roller can be freely set to change the length of the straight edge; the upper roller directly applies pressure to control the shape of the straight edge, achieving high-precision pre-bending of the ends.
- High-precision pre-bending of ends When pre-bending the ends of the plate, the size of the horizontal movement of the upper roller can be freely set to change the length of the straight edge; the upper roller directly applies pressure to control the shape of the straight edge, achieving high-precision pre-bending of the ends.
Safety Operation Precautions
- Conduct a comprehensive inspection of the machine tool, ensuring all components and bolts are securely fastened, hydraulic pump oil level is above the oil mark, and electrical switches and limit switches are functioning properly.
- Ensure proper lubrication of all required parts of the machine tool.
- Do not touch rotating workpieces or machine components during operation.
- Standing under the tipping frame of the upper roller universal plate bending machine is strictly prohibited.
- The machine tool is not allowed to bend plates with weld seams.
- Do not rotate at welding joints.
- Overloading of plate rolling (diameter, material, thickness) is not permitted.
- The upper roller of the universal plate bending machine must not bear a load when moving horizontally.
- When the upper roller of the cone rolling machine rises or tilts, the rear end of the upper roller must not be pressed against the crossbeam to prevent damage to the upper roller.
- The plate bending machine must be operated by a dedicated operator.
In conclusion, the PBT plate bending machine represents a fusion of Japanese technology and domestic practicality, delivering exceptional performance in the realm of plate rolling. With its hydraulic upper roller design, this machine seamlessly executes processes such as pre-bending, rolling, and correcting of various steel plates at room temperature. The utilization of advanced components, including an industrial touchscreen integrated with a PLC, ensures optimal functionality and real-time monitoring for precise synchronization accuracy. Furthermore, the machine’s high-quality electrical and hydraulic components contribute to its smooth operation, reliability, and low failure rate. Combined with technical features such as crown upper roller support and rear bending techniques, the PBT plate bending machine offers superior precision and versatility, making it a valuable asset in the fabrication industry.